Pennsylvania’s highest court will decide if counties have to accept provisional ballots cast on election day at polling places by voters whose mail-in ballots lacked secrecy envelopes or were rejected for other flaws.

The Republican National Committee argued that counties do not have the authority to allow voters in the swing state to correct ballots that do not comply with the rules.

For now, mail-in ballots returned without a date on the outside of the envelope will not be counted in the Commonwealth of Pennsylvania.